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O/A welding and gasoline cutting torch

A

Anonymous-0

Well-known Member
I was looking around on the web and came across Oxygen/ gasoline cutting torches. Has anyone used one? They claim they oxidize the steel 100% and are safer than acetylene. They also claim they save huge amounts on fuel costs and cutting is way faster. When asked why they aren't more popular, they say it's because most welding supplies are owned by gas suppliers. You still need oxygen with them. It seems to me that if they are as good as the claims, a lot of places would sell them or they could set up their own stores.
The question was also asked if they could be used for welding. The answer confirms a question that has been asked on here several times. In order to do sound oxy/fuel welding, you need to use a neutral flame. Acetylene is the only fuel that produces enough heat for welding with a neutral flame. Other fuels do not produce a neutral flame suitable for sound welds. Dave
 
i can tell you from experience in the emergency services technical rescue world that a petrogen torch is second to none. cuts faster and easier. a little different to get started but not bad. uses gasoline which is easy to refill, easier and more plentiful to get than acetyline. and if you are cutting something hollow or like in I beam, it will cut both planes at the same time rather than just the top one like a regular oxygen/acetyline torch. as far as welding goes, not sure how well it would work. might be too much and too aggressive of heat for welding. i"d be interested to know what others think.
 
Hi Dave,

I think the initial cost is a big factor in their lack of popularity. When I've checked into it, the price made it seem that it might take many years of use to recoup the initial outlay. That's from memory, I don't have actual figures handy to back it up.

Stan
 
Hi Dave,

Edited: I deleted my post as this is something that is not suited for the typical YT-mag user and way the beyond the scope of the internet.

I can see nothing but huge safety problems with trying too use liquid fuel at the torch body.

The only reason why someone would want to use a liquid fuel at the mixing body would be the fuel was too low in BTU content to be used in a vapor state therefor worthless as cutting torch for general construction.

In general, vapor fuel is relative safe where as liquid fuel is very, very dangerous in a cutting torch.

The only gasoline torch's that I've read about all use vapor, no liquid.

T_Bone
 
The gasoline torches are liquid in the hose and don't turn to vapour until exitting the tip. Apparently the liquid fuel keeps the torch and tip cool to the touch. There's some videos on them but it doesn't really show how nice of a cut is possible or how wide the kerf is, etc. They look like they would be good for demolition and salvage type work. Flame is reported to be 5200 deg. but uses excess oxygen. Looked interesting though. Dave
 
The gas torches are UL listed. They use a special gas tank with pressure to push the liquid gas. Gasoline is not flammable in the liquid state, only the fumes are flammable, is their claim. The tank has a check valve that will shut off the fuel should a hose get a leak. They claim only about a tablespoon of gas would leak out. Apparently flashbacks are non existant using liquid gasoline. They also claim gas has more btu content than acetylene. Propane has more btu content as well but acetylene produces the hottest flame. Google Petrogen torch. It's interesting for sure. Dave
 
As with oxy/propane I expect that you could not weld with the gasoline/oxy torches.

Just heat cut and braze.
 
Hey dave! I use oxy-acetylene on a regular basis and find myself in odd positions under machinery cutting and I probably would not feel comfortable using a liquid-fueled torch.
Incidentally I use a safety person with a fire extinguisher when I am in a position that precludes an easy quick exit!!

Good luck, Brad
 
The gasoline/oxy torch is best suited for large demolition projects and the emergency services. A very effective tool to cut large amounts of thick metal very rapidly.
 
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